Comments on: Protect Mode In Yamaha C4 Pre-Amp Solved

By: Parasuraman S

Parasuraman S — Tue, 12 Sep 2017 23:11:40 +0000

I do not know where you are located. Perhaps Jestine Yong may know from his contact list and email or get it from you to reply you.

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By: louis maggio

louis maggio — Wed, 05 Jul 2017 16:15:44 +0000

Dear Sir
I am an original owner of Yamaha components "M4 Amp, C4 Pre amp, T2 Tuner and YPD10 turntable.

Several years back I purchased a Mac Amp to replace M4 which I still own.

My C4 is having problems with the Right and Left channels!

My question is I need to have this unit repaired and I am at a loss of who to send it to ? Can you please give me a contact name of who I can call to discuss having this unit repaired. Best Regards

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By: Daniel Fiorda

Daniel Fiorda — Fri, 03 Feb 2017 21:14:07 +0000

Great Job Sir! Your work encouraged me to open my equipment and to repair it. Unfortunately my C4 didn't get better changing such diodes solely. I had to remake all solderings and now is working properly.

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By: Seppo Ruuskanen

Seppo Ruuskanen — Mon, 11 Jul 2016 21:54:42 +0000

Yes, thank You a lot. I too have a C4 where the sound cracles up after it begins to warm up. So far I have resoldered the uppger boards and expect to resolder the lower ones during the week. I also plan to replace as many of the old elcaps as I can to modern better ones.

Regards

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By: kamal

kamal — Sun, 13 Dec 2015 07:49:44 +0000

hi sir,ur doing fantastic job.

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By: Robert Calk

Robert Calk — Wed, 09 Dec 2015 13:09:46 +0000

In reply to Parasuraman S.

I clean the dust off with alcohol. A knife will get the job done.

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By: Tyrone

Tyrone — Wed, 09 Dec 2015 12:51:39 +0000

Thanks Parasuraman for this post which is very enlightening God bless you.

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By: Parasuraman S

Parasuraman S — Wed, 09 Dec 2015 08:10:53 +0000

I thank one and all for your very encouraging comments!

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By: Parasuraman S

Parasuraman S — Wed, 09 Dec 2015 08:09:54 +0000

In reply to Robert Calk.

I too use sand paper, wherever possible. I used multi-strand wires for this job, and that cannot be properly cleaned by sand paper. So I use a sharp pen knife kept on my table for this purpose. It gives a shining surface and never cuts the strands. With the knife you can force in slightly, whereas with a sandpaper, you have limitations. Moreover, it will leave its own dust on the contact!

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By: Ulises Aguilar Pazzani

Ulises Aguilar Pazzani — Wed, 09 Dec 2015 01:52:41 +0000

Mr Subramanian, a well job done . always read Your articles take care Sir

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